Directory of inventor aids, supplemental to professional services of the patent bar.
Contributors: Seward, Paul Sanford, 1905-
Edition: 1950 ed.
Publisher: Directory of Inventor Aids
Published: 1949
Place of publication: Clearwater, Fla
Language: eng
Number of pages: 64
Subjects: Patents; Patents -- United States -- Directories
Genres: Directories.
Notes: Compiled by Paul S. Seward.